"I keep reading that women rarely change their mind about leaving. But I also read another "expert" that said that simply wasn't true. So which is it? Is it less hopeful when it's the wife leaving?"
Both. Look, every situation is different. We all have free will. You can't say that if you do X, Y, Z, your W is sure to come back. Anyone who tells you that they can predict exactly that your W is coming back or not is a fool. I've seen situations that seemed absolutely hopeless, but they worked out. That's how life is. That's why it's important for you to not have expectations and leave it to the Man upstairs.
"And is it common for the unfaithful spouse to try to avoid all contact from the day they leave?"
Yes. It's like ripping a bandaid off a wound. The faster they get it over with, the quicker it is for them to not change their mind or think of consequences.
M-43 W-40 2D - 9 and 5
Emotion, yet peace. Ignorance, yet knowledge. Passion, yet serenity. Chaos, yet harmony. Death, yet a new life.